hi,
i have to check when is the cipher mode decided during HO. Without any background about this, i’d say that you should check the HO REQUIRED sent from MSC to the Nokia BSC.
The MSC should be aware of the cipher capabilities of the Nokia BSS and should negociate a5/1 instead of a5/3.
As I’m on holidays, I’m not sure I can’t check this out right now 🙂
Cheers
pix